I am a prime number.
The double of myself is equal to the square of me.

which number am I?

You can see three almost identical images below. Can you spot the odd one out from them?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

Can you write down eight eights so that they add up to one thousand?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

I taste better than I can smell. Who am I?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)